纳米TiO_2-沸石光催化降解含酚废水的研究

Study on the photocatalysis degradation of phenol-containing wastewater by nano TiO_2/zeolite

以钛酸四丁酯为前驱体,利用溶胶-凝胶法制备了纳米二氧化钛粉体材料,再加入吸附剂沸石.通过纳米TiO2-沸石对含酚废水的光催化降解实验,研究了光催化剂TiO2的投加量、光催化剂TiO2和沸石的配比、降解时间对光催化性能的影响.结果表明:光催化剂TiO2和沸石的最佳配比为6∶1,催化剂TiO2用量为4 g/L时,紫外光照射3 h后,COD的去除率可达到59.1%以上.

The nano titanium dioxide was prepared by sol-gel process using tetrabutyl titanate as a precursor, and then the zeolite as a adsorbent was added. With phenol-containing wastewater as a contaminant,the activi- ties of the samples were investigated with different adding volume of TiO2, ratio of TiOJzeolite and degradation time. The results indicated that the optimal ratio of TiO2 and zeolite was 6： 1, the amount of the catalyst is 4 g/L, the removal rate of COD was up to 59.1% aftcr being irradiated for three hours by ultraviolet.